Display panel

ABSTRACT

A display panel includes an active device disposed on a substrate, a first electrode electrically connected to the active device, a pixel definition layer, a light emitting layer, a second electrode, a shielding pattern layer, and first and second color filter pattern layers. The pixel definition layer has a first opening overlapped with the first electrode. At least a portion of the light emitting layer is disposed within the first opening and on the first electrode. The second electrode is disposed on the light emitting layer. The shielding pattern layer is disposed on the second electrode and has a second opening overlapped with the first opening. The first color filter pattern layer is disposed on the second electrode and overlapped with the first and second openings. The second color filter pattern layer is disposed on the second electrode. The first and second color filter pattern layers are stacked with each other right above the shielding pattern layer.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of Taiwan applicationserial no. 106146327, filed on Dec. 28, 2017. The entirety of theabove-mentioned patent application is hereby incorporated by referenceherein and made a part of this specification.

TECHNICAL FIELD

The disclosure relates to a display panel, and more particularly, to aself-luminescent display panel.

RELATED ART

In recent years, active matrix organic light-emitting diode (AMOLED)technologies continue to make breakthroughs, and the AMOLED has beensuccessfully applied to portable display panels. At present, one of thecommonly used technologies for making a full-color AMOLED display panelhas applied a structure having a color filter layer and an organiclight-emitting diode (OLED) which is used as a light source. To increasethe contrast, said structure is often equipped with a black matrix (BM).However, said BM may easily cause the AMOLED display panel severe colorshift due to viewing angle change because the AMOLED display panel has acell gap of up to about 18 μm.

SUMMARY

An embodiment of the invention provides a display panel for resolvingthe color shift issue due to viewing angle change.

An embodiment of the invention provides a display panel for enhancingthe display quality.

In an embodiment of the invention, a display panel includes an activedevice, a first electrode, a pixel definition layer, a light emittinglayer, a second electrode, a shielding pattern layer, a first colorfilter pattern layer, and a second color filter pattern layer. Theactive device is disposed on a substrate. The first electrode iselectrically connected to the active device. The pixel definition layerhas a first opening overlapped with the first electrode. The lightemitting layer is overlapped with the first opening and located on thefirst electrode. At least a portion of the light emitting layer isdisposed within the first opening and located on the first electrode.The second electrode is disposed on the light emitting layer. Theshielding pattern layer is disposed on the second electrode and has asecond opening overlapped with the first opening. The first color filterpattern layer is disposed on the second electrode and overlapped withthe first and second openings. The second color filter pattern layer isdisposed on the second electrode, wherein the first color filter patternlayer and the second color filter pattern layer are stacked with eachother right above the shielding pattern layer.

In an embodiment of the invention, a display panel includes a pluralityof active devices, a plurality of first electrodes, a pixel definitionlayer, a plurality of light emitting layers, at least one secondelectrode, a shielding pattern layer, a first color filter patternlayer, and a second color filter pattern layer. The active devices aredisposed on a substrate. The first electrodes are electrically connectedto the active devices, respectively. The pixel definition layer has aplurality of first openings respectively overlapped with the firstelectrodes. The light emitting layers are overlapped with the firstopenings and located on the first electrodes, respectively. The at leastone second electrode is disposed on the light emitting layers. Theshielding pattern layer is disposed on the at least one second electrodeand has a plurality of second openings overlapped with the firstopenings, respectively. The first color filter pattern layer is disposedon the at least one second electrode and overlapped with a correspondingone of the first openings and a corresponding one of the secondopenings. The second color filter pattern layer is disposed on the atleast one second electrode, wherein a stacked portion formed by thesecond color filter pattern layer and the first color filter patternlayer is right above the shielding pattern layer and not overlapped withthe second openings.

In view of the above, the display panel provided in an embodiment of theinvention includes the active device located on the substrate, the firstelectrode electrically connected to the active device, the pixeldefinition layer having the first opening overlapped with the firstelectrode, the light emitting layer overlapped with the first openingand on the first electrode, the second electrode disposed on the lightemitting layer, the shielding pattern layer disposed on the secondelectrode and having a second opening overlapped with the first opening,the first color filter pattern layer disposed on the second electrodeand overlapped with the first opening and the second opening, and thesecond color filter pattern layer stacked with the first color filterpattern layer right above the shielding pattern layer. Hence, incomparison with the conventional display panel, the display paneldescribed herein has a smaller cell gap and a better viewing anglerange, such that the defect of color shift due to viewing angle changemay be rectified.

To make the above features and advantages provided in one or more of theembodiments of the disclosure more comprehensible, several embodimentsaccompanied with drawings are described in detail as follows.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the disclosure, and are incorporated in and constitutea part of this specification. The drawings illustrate embodiments of thedisclosure and, together with the description, serve to explain theprinciples described herein.

FIG. 1 is a schematic cross-sectional view of a portion of the displaypanel according to an embodiment of the disclosure.

FIG. 2 is a schematic top view illustrating an arrangement of the pixeldefinition layer, the touch structure, and the shielding pattern layerdepicted in FIG. 1.

FIG. 3 is a schematic top view illustrating another arrangement of apixel definition layer, a touch structure, and a shielding patternlayer.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 is a schematic cross-sectional view of a portion of the displaypanel according to an embodiment of the disclosure. FIG. 2 is aschematic top view illustrating an arrangement of the pixel definitionlayer, the touch structure, and the shielding pattern layer depicted inFIG. 1. Note that the cross-sectional position shown in FIG. 1 may bereferred to as the position of a sectional line I-I′ depicted in FIG. 2.

With reference to FIG. 1 and FIG. 2, the display panel 10 is aself-luminescent display panel, for instance. In the present embodiment,the display panel 10 is exemplified as an OLED display panel. Thedisplay panel 10 provided in the present embodiment includes a substrate100, an active device T1, an active device T2, a first electrode A1, afirst electrode A2, a pixel definition layer PDL, a light emitting layerEL1, a light emitting layer EL2, a second electrode C, a shieldingpattern layer BM, a color filter pattern layer CF1, a color filterpattern layer CF2, a color filter pattern layer CF3, and a color filterpattern layer CF4. Besides, in this embodiment, the display panel 10 mayfurther include a protection layer P1, a gate insulation layer GI, aninterlayer insulation layer L1, an interlayer insulation layer L2, aplanarization layer PL, a package structure layer TFE, a touch structurelayer TP, a protection layer P2, and a cover plate 110.

The substrate 100 provided in this embodiment may be a flexiblesubstrate, such as a polymer substrate or a plastic substrate, but theinvention is not limited thereto. In other embodiments, the substrate100 may also be a rigid substrate, e.g., a glass substrate, a quartzsubstrate, or a silicon substrate.

According to the present embodiment, the protection layer P1 is disposedon one side of the substrate 100 and configured to balance the stressbetween the substrate 100 and the cover plate 110 in the display panel10. In the present embodiment, the material of the protection layer P1may include polyethylene terephthalate (PET), polyimide (PI), ortriacetylcellulose (TAC).

In the present embodiment, the cover plate 110 and the substrate 100 aredisposed opposite to each other. The cover plate 110 provided in thisembodiment may be a flexible substrate, such as a polymer substrate or aplastic substrate, but the invention is not limited thereto. In otherembodiments, the cover plate 110 may also be a rigid substrate, e.g., aglass substrate, a quartz substrate, or a silicon substrate. In anotheraspect, both the cover plate 110 and the substrate 100 provided in thisembodiment may be transparent, which should however not be construed asbeing limited to the embodiment set forth herein. In other embodiments,one of the cover plate 110 and the substrate 100 is transparent.

According to the present embodiment, the active device T1 and the activedevice T2 are disposed on the substrate 100. The active device T1provided in the present embodiment includes a semiconductor layer SC1, agate G1, a source S1, and a drain D1. The semiconductor layer SC1includes a source region SR1, a drain region DR1, and a channel regionCR1. The gate G1 is located above and overlapped with the channel regionCR1. The source S1 is electrically connected to the source region SR1through a contact window H1 formed in the gate insulation layer GI(elaborated hereinafter) and the interlayer insulation layer L1(elaborated hereinafter). The drain D1 is electrically connected to thedrain region DR1 through a contact window H2 formed in the gateinsulation layer GI (elaborated hereinafter) and the interlayerinsulation layer L1 (elaborated hereinafter). Besides, in the presentembodiment, the active device T2 provided in the present embodimentincludes a semiconductor layer SC2, a gate G2, a source S2, and a drainD2. The semiconductor layer SC2 includes a source region SR2, a drainregion DR2, and a channel region CR2. The gate G2 is located above andoverlapped with the channel region CR2. The source S2 is electricallyconnected to the source region SR2 through a contact window H3 formed inthe gate insulation layer GI (elaborated hereinafter) and the interlayerinsulation layer L1 (elaborated hereinafter). The drain D2 iselectrically connected to the drain region DR2 through a contact windowH4 formed in the gate insulation layer GI (elaborated hereinafter) andthe interlayer insulation layer L1 (elaborated hereinafter). That is, inthe present embodiment, the active device T1 and the active device T2are top-gate thin film transistors (TFT), but the invention is notlimited thereto. According to other embodiments, the active devices T1and T2 may be bottom-gate TFTs.

In this embodiment, the materials of the gate G1, the source S1, thedrain D1, the gate G2, the source S2, and the drain D2 may includemetal, alloy, nitrides of the aforesaid materials, oxides of theaforesaid materials, oxynitrides of the aforesaid materials, atransparent conductive material, other non-metallic but electricallyconductive materials, or other suitable materials. The materials of thesemiconductor layer SC1 and the semiconductor layer SC2 provided in theembodiment may include polysilicon or a metal oxide semiconductormaterial, e.g., indium gallium zinc oxide, zinc oxide, tin oxide, indiumzinc oxide, gallium zinc oxide, zinc tin oxide, or indium tin oxide.

In this embodiment, the gate insulation layer GI may be entirely formedon the substrate 100 and covers the semiconductor layer SC1 and thesemiconductor layer SC2. The gate insulation layer GI may be of asingle-layer structure or a multi-layer structure, and the material ofthe gate insulation layer GI may include an inorganic material, anorganic material, or other appropriate materials. Here, the inorganicmaterial includes but is not limited to silicon oxide, silicon nitride,or silicon oxynitride, for instance, and the organic material includesbut is not limited to, polyimide resins, epoxy resins, or acrylicresins, for instance.

In the present embodiment, the interlayer insulation layer L1 may beentirely formed on the substrate 100 and covers the gate G1 and the gateG2. The interlayer insulation layer L1 may be of a single-layerstructure or a multi-layer structure, and the material of the interlayerinsulation layer L1 may include an inorganic material, an organicmaterial, or other appropriate materials. Here, the inorganic materialincludes but is not limited to silicon oxide, silicon nitride, orsilicon oxynitride, for instance, and the organic material includes butis not limited to, polyimide resins, epoxy resins, or acrylic resins,for instance.

The interlayer insulation layer L2 provided in the present embodiment isentirely formed on the substrate 100 and covers the active devices T1and T2 to provide insulation and protection. The interlayer insulationlayer L2 may be of a single-layer structure or a multi-layer structure,and the material of the gate insulation layer GI may include aninorganic material, an organic material, or other appropriate materials.Here, the inorganic material includes but is not limited to siliconoxide, silicon nitride, or silicon oxynitride, for instance, and theorganic material includes but is not limited to, polyimide resins, epoxyresins, or acrylic resins, for instance.

In the present embodiment, the first electrode A1 and the secondelectrode A2 are electrically connected to the active device T1 and theactive device T2, respectively. According to the present embodiment, thefirst electrode A1 is electrically connected to the drain D1 of theactive device T1 through a contact window H5 formed in the planarizationlayer PL (elaborated hereinafter) and the interlayer insulation layer L2(elaborated hereinafter), and the first electrode A2 is electricallyconnected to the drain D2 of the active device T2 through a contactwindow H6 formed in the planarization layer PL (elaborated hereinafter)and the interlayer insulation layer L2 (elaborated hereinafter).Besides, the material of the first and second electrodes A1 and A2 mayinclude a transparent conductive material or a non-transparentconductive material. The transparent conductive material may include ametal oxide conductive material, e.g., indium tin oxide, indium zincoxide, aluminum tin oxide, aluminum zinc oxide, indium gallium zincoxide, other suitable oxides, or a stacked layer of at least two of theaforesaid materials. The non-transparent conductive material may includemetal.

The planarization layer PL provided in the present embodiment may beentirely formed on the substrate 100 and covers the active devices T1and T2 to provide protection and ensure planarization. The planarizationlayer PL may be of a single-layer structure or a multi-layer structure,and the material of the planarization layer PL may include an inorganicmaterial, an organic material, or other appropriate materials. Here, theinorganic material includes but is not limited to silicon oxide, siliconnitride, or silicon oxynitride, for instance, and the organic materialincludes but is not limited to, polyimide resins, epoxy resins, oracrylic resins, for instance.

According to the present embodiment, the pixel definition layer PDL isdisposed on the first electrode A1 and the first electrode A2. The pixeldefinition layer PDL provided in the present embodiment has a firstopening U1 and a first opening U2 that are respectively overlapped withthe first electrode A1 and the first electrode A2. That is, in thepresent embodiment, the first opening U1 and the first opening U2 may beconfigured to expose a portion of the first electrode A1 and a portionof the first electrode A2, respectively. Besides, in the embodiment, thematerial of the pixel definition layer PDL may include a photosensitivepolyimide material, a propylene-based material, a siloxane material, aphenolic resin material, oxides, nitrides, or oxynitrides. However, theinvention is not limited thereto. The material of the pixel definitionlayer PDL may include a non-black insulation material, which shouldhowever not be construed as a limitation in the disclosure.

According to the present embodiment, as shown in FIG. 2, the pixeldefinition layer PDL has a grid-shaped layout. In other words, the pixeldefinition layer PDL is a patterned film layer. From anotherperspective, the embodiments shown in FIG. 1 and FIG. 2 merely describethe first opening U1 and the first opening U2; however, as shown in FIG.2, the pixel definition layer PDL may actually be equipped with two ormore first openings. In view of the above, the first openings (includingthe first opening U1 and the first opening U2) of the pixel definitionlayer PDL described in the present embodiment and depicted in FIG. 2 arealigned to form a matrix.

The light emitting layer EL1 and the light emitting layer EL2 providedin the embodiment are respectively overlapped with the first opening U1and the first opening U2. The light emitting layer EL1 and the lightemitting layer EL2 may be respectively disposed within the first openingU1 and the first opening U2 and respectively located on the firstelectrode A1 and the first electrode A2. At least a portion of the lightemitting layer EL1 may be disposed within the first opening U1 andlocated on the first electrode A1. At least a portion of the lightemitting layer EL2 may be disposed within the first opening U2 andlocated on the first electrode A2. The light emitting layers EL1 and EL2provided in the present embodiment may respectively be any lightemitting layer that can be used in the OLED display panel and arewell-known to people having ordinary skill in the art. The lightemitting layers EL1 and EL2 may respectively include organic lightemitting materials in red, green, blue, white, or other colors, or acombination of said light emitting materials. For instance, in anembodiment, the light emitting layer EL1 may include a white organiclight emitting material, and the light emitting layer EL2 may alsoinclude a white organic light emitting material. That is, the lightsemitted via the light emitting layer EL1 and the light emitting layerEL2 are white lights. In an embodiment, for instance, the color of thelight emitting layer EL1 and the color of the light emitting layer EL2are of different colors, wherein the light emitting layer EL1 mayinclude a green organic light emitting material, and the light emittinglayer EL2 may include a red organic light emitting material. That is,the color of the light emitting layer EL1 is green, and the color of thelight emitting layer EL2 is red. Besides, the light emitting layers EL1and EL2 may respectively include an electron transport layer, anelectron injection layer, a hole transport layer, a hole injectionlayer, or a combination of said four film layers.

In the present embodiment, the second electrode C is disposed on thelight emitting layer EL1 and the light emitting layer EL2. In thepresent embodiment, the second electrode C is entirely formed on thesubstrate 100. That is, the display panel 10 provided in the embodimenthas one second electrode C. Nevertheless, the disclosure should not beconstrued as limited to the embodiments set forth herein. In otherembodiments, the display panel 10 may include a plurality of secondelectrodes formed by performing a patterning process. The material ofthe second electrode C may include a transparent conductive material ora non-transparent conductive material. The transparent conductivematerial may include a metal oxide conductive material, e.g., indium tinoxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide,indium gallium zinc oxide, other suitable oxides, or a stacked layer ofat least two of the aforesaid materials. The non-transparent conductivematerial may include metal.

In this embodiment, the first electrode A1, the light emitting layer EL1and the portion of the second electrode C overlapped with the lightemitting layer EL1 constitute an OLED O1, and the first electrode A2,the light emitting layer EL2 and the portion of the second electrode Coverlapped with the light emitting layer EL2 constitute an OLED O2.Here, the first electrode A1 serves as the anode of the OLED O1, thefirst electrode A2 serves as the anode of the OLED O2, and the secondelectrode C serves as the cathode of the OLED O1 and the cathode of theOLED O2. However, in terms of design requirements, the first electrodeA1 may also serve as the cathode of the OLED O1, the first electrode A2may serve as the cathode of the OLED O2, and the second electrode C mayserve as the anode of the OLED O1 and the anode of the OLED O2. Thelight emitting layer EL1 is driven by the voltage difference generatedbetween the first electrode A1 and the second electrode C to emit light,and the light emitting layer EL2 is driven by the voltage differencegenerated between the first electrode A2 and the second electrode C toemit light. Hence, in an embodiment, if the light emitting layers EL1and EL2 are white light emitting layers, the OLEDs O1 and O2 emit whitelight.

In the present embodiment, the package structure layer TFE is disposedon the OLEDs O1 and O2 for isolating moisture and impurities. Thepackage structure layer TFE provided herein may include a firstinorganic layer TFEa, an organic layer TFEb, and a second inorganiclayer TFEc; however, the invention is not limited thereto. The organiclayer TFEb is located between the first inorganic layer TFEa and thesecond inorganic layer TFEc, and the second inorganic layer TFEc islocated on the organic layer TFEb. In addition, the material of thefirst inorganic layer TFEa may include silicon nitride or aluminumoxide, the material of the organic layer TFEb may include acrylicresins, epoxy resins, or silicon oxycarbide, and the material of thesecond inorganic layer TFEc may include silicon nitride or aluminumoxide.

In the present embodiment, the touch structure layer TP is disposed onthe package structure layer TPE. That is, the display panel 10 canperform a touch function and is categorized as an in-cell touch displaypanel. According to the present embodiment, the touch structure layer TPis in contact with the second inorganic layer TFEc, which should not beconstrued as a limitation in the disclosure. The touch structure layerTP has a third opening W1 and a third opening W2 that are respectivelyoverlapped with the first opening U1 and the first opening U2 of thepixel definition layer PDL. In the present embodiment, the width z1 ofthe third opening W1 is greater than the width x1 of the first openingU1, and the width z2 of the third opening W2 is greater than the widthx2 of the first opening U2. In other words, according to the presentembodiment, a vertical projection of the first opening U1 is completelylocated within a vertical projection of the third opening W1, and avertical projection of the first opening U2 is completely located withina vertical projection of the third opening W2.

According to the present embodiment, as shown in FIG. 2, the touchstructure layer TP has a grid-shaped layout. In other words, the touchstructure layer TP is a patterned film layer. From another perspective,the embodiments shown in FIG. 1 and FIG. 2 merely describe the thirdopening W1 and the third opening W2; however, as shown in FIG. 2, thetouch structure layer TP may actually be equipped with two or more thirdopenings. In view of the above, the third openings (including the thirdopening W1 and the third opening W2) of the touch structure layer TPdescribed in the present embodiment and depicted in FIG. 2 are alignedto form a matrix.

The touch structure layer TP provided in the present embodiment mayinclude any type of capacitive touch structure known to people havingordinary skill in the art, e.g., a mutual-capacitive touch structure ora self-capacitive touch structure. Nevertheless, the disclosure shouldnot be construed as limited to the embodiments set forth herein. Inother embodiments, the touch structure layer TP may also include anyother type of touch structure known to people having ordinary skill inthe art, such as a resistive touch structure, an electromagnetic touchstructure, etc.

In the present embodiment, the shielding pattern layer BM is disposed onthe touch structure layer TP. As described above, since the touchstructure layer TP is located on the package structure layer TFE and thepackage structure layer TFE is disposed on the OLED O1 and the OLED O2,the package structure layer TFE is disposed between the second electrodeC and the shielding pattern layer BM, the touch structure layer TP isdisposed between the second electrode C and the shielding pattern layerBM, and the shielding pattern layer BM is disposed on the secondelectrode C. The shielding pattern layer BM is in contact with thesecond inorganic layer TFEc, but the disclosure is not limited thereto.Besides, in the present embodiment, the material of the shieldingpattern layer BM may be a black resin or a non-transparent material withlow reflectivity, such as light shielding metal (e.g., chromium).

In the present embodiment, the shielding pattern layer BM has a secondopening V1 and a second opening V2 that are respectively overlapped withthe first opening U1 and the first opening U2 of the pixel definitionlayer PDL. As provided above, the third opening W1 and the third openingW2 of the touch structure layer TP are respectively overlapped with thefirst opening U1 and the first opening U2. Hence, given that the secondopening V1 and the second opening V2 are respectively overlapped withthe first opening U1 and the first opening U2, the third opening W1overlaps the first opening U1 and the second opening V1, and the thirdopening W2 overlaps the first opening U2 and the second opening V2.

In the present embodiment, the width y1 of the second opening V1 isgreater than the width x1 of the first opening U1, and the width y2 ofthe second opening V2 is greater than the width x2 of the first openingU2. In other words, according to the present embodiment, the verticalprojection of the first opening U1 is completely located within avertical projection of the second opening V1, and the verticalprojection of the first opening U2 is completely located within avertical projection of the second opening V2. In another aspect, theedge of the vertical projection of the pixel definition layer PDL on thesubstrate 100 protrudes by a distance d1 to the edge of the verticalprojection of the shielding pattern layer BM on the substrate 100. Inthe present embodiment, the distance d1 may be about 3 μm to about 10μm. In an embodiment, the distance d1 may be about 6 μm.

According to the present embodiment, since the edge of the verticalprojection of the pixel definition layer PDL on the substrate 100protrudes by the distance d1 to the edge of the vertical projection ofthe shielding pattern layer BM on the substrate 100, the light emittedfrom the OLED O1 and the OLED O2 may not be easily blocked by theshielding pattern layer BM. In particular, according to the presentembodiment, since the distance d1 is about 3 μm to about 10 μm, thedisplay panel 10 is still characterized by good contrast although thelight emitted from the OLED O1 and the OLED O2 may not be easily blockedby the shielding pattern layer BM.

In the present embodiment, the width z1 of the third opening W1 isgreater than the width y1 of the second opening V1, and the width z2 ofthe third opening W2 is greater than the width y2 of the second openingV2. That is, according to the present embodiment, a vertical projectionof the second opening V1 is completely located within the verticalprojection of the third opening W1, and a vertical projection of thesecond opening V2 is completely located within the vertical projectionof the third opening W2. From another perspective, in the presentembodiment, the shielding pattern layer BM covers the touch structurelayer TP and contacts the package structure layer TFE located below thetouch structure layer TP. Thereby, in the present embodiment, it islikely for the touch structure layer TP not to be seen by users.

According to the present embodiment, the minimum vertical distance sdbetween the upper surface TS1 of the shielding pattern layer BM and theupper surface TS2 of the portion of the second electrode C overlappedwith the light emitting layer EL1 or the light emitting layer EL2 isabout 3 μm to about 15 μm. In an embodiment, the minimum verticaldistance sd is about 6 μm. Here, the minimum vertical distance sdbetween the upper surface TS1 and the upper surface TS2 is defined as acell gap of the display panel 10.

According to the present embodiment, as shown in FIG. 2, the shieldingpattern layer BM has a grid-shaped layout. In other words, the shieldingpattern layer BM is a patterned film layer. From another perspective,the embodiments shown in FIG. 1 and FIG. 2 merely describe the secondopening V1 and the second opening V2; however, as shown in FIG. 2, theshielding pattern layer BM may actually be equipped with two or moresecond openings. In view of the above, the second openings (includingthe second opening V1 and the second opening V2) of the shieldingpattern layer BM described in the present embodiment and depicted inFIG. 2 are aligned to form a matrix.

The color filter pattern layer CF1 provided in the present embodiment islocated on the second electrode C. The shielding pattern layer BMprovided in the present embodiment is located between the color filterpattern layer CF1 and the second electrode C. Besides, the color filterpattern layer CF1 overlaps the first opening U1 and the second openingV1 according to the present embodiment. Namely, in the presentembodiment, the color filter pattern layer CF1 overlaps the lightemitting layer EL1 of the OLED O1. As such, the light emitted from theOLED O1 passes through the color filter pattern layer CF1.

The color filter pattern layer CF1 provided in the present embodimentmay be any color filter pattern layer that can be used in the OLEDdisplay panel and is well-known to people having ordinary skill in theart. The color of the color filter pattern layer CF1 may be red, green,or blue. For instance, in an embodiment, when the light emitting layerEL1 includes the white organic light emitting material, the color of thecolor filter pattern layer CF1 may be green. Namely, the white lightemitted by the light emitting layer EL1 is converted into a green lightafter passing through the color filter pattern layer CF1. In anotherexample provided in an embodiment of the invention, if the lightemitting layer EL1 includes the green organic light emitting material,the color of the color filter pattern layer CF1 may be green; namely, alight passing through the color filter pattern layer CF1 and a lightemitted via the light emitting layer EL1 have same color. Hence, thegreen light emitted by the light emitting layer EL1 is still green afterpassing through the color filter pattern layer CF1.

The color filter pattern layer CF2 provided in the present embodiment islocated on the second electrode C. The shielding pattern layer BMprovided in the present embodiment is located between the color filterpattern layer CF2 and the second electrode C. Besides, the color filterpattern layer CF2 overlaps the first opening U2 and the second openingV2 according to the present embodiment. Namely, in the presentembodiment, the color filter pattern layer CF2 overlaps the lightemitting layer EL2 of the OLED O2. As such, the light emitted from theOLED O2 passes through the color filter pattern layer CF2.

The color filter pattern layer CF2 provided in the present embodimentmay be any color filter pattern layer that can be used in the OLEDdisplay panel and is well-known to people having ordinary skill in theart. The color of the color filter pattern layer CF2 may be red, green,or blue. For instance, in an embodiment, when the light emitting layerEL2 includes the white organic light emitting material, the color of thecolor filter pattern layer CF2 may be red. Namely, the white lightemitted by the light emitting layer EL2 is converted into a red lightafter passing through the color filter pattern layer CF2. In anotherexample provided in an embodiment of the invention, when the lightemitting layer EL2 includes the red organic light emitting material, thecolor of the color filter pattern layer CF2 may be red. Namely, a lightpassing through the color filter pattern layer CF2 and a light emittedvia the light emitting layer EL2 have same color. Hence, the red lightemitted by the light emitting layer EL2 is still red after passingthrough the color filter pattern layer CF2.

According to the present embodiment, the color of the color filterpattern layer CF2 and the color of the color filter pattern layer CF1are different, and the color of the color filter pattern layer CF1 andthe color of the color filter pattern layer CF2 may respectively beselected from a group consisting of the red color, the green color, andthe blue color. For instance, in an embodiment, the color of the colorfilter pattern layer CF1 is green, and the color of the color filterpattern layer CF2 is red.

According to the present embodiment, the color filter pattern layer CF2and the color filter pattern layer CF1 are stacked right above theshielding pattern layer BM to form a stacked layer structure SS1. Asdescribed above, the color of the color filter pattern layer CF2 isdifferent from the color of the color filter pattern layer CF1.Therefore, if the ambient light is reflected by the shielding patternlayer BM, the reflected light passing through the stacked layerstructure SS1 is completely absorbed. As a result, interference of theambient light with the display panel 10 is reduced, and the hue in thedark state of the display panel 10 becomes more balanced or becomescloser to pure black.

Besides, in this embodiment, a stacked portion (i.e., the stacked layerstructure SS1) formed by the color filter pattern layer CF2 and thecolor filter pattern layer CF1 does not overlap the second opening V1and the second opening V2 of the shielding pattern layer BM. Namely, thevertical projection of the stacked layer structure SS1 is completelylocated within the vertical projection of the shielding pattern layerBM. From another perspective, in the present embodiment, the edge of thevertical projection of the shielding pattern layer BM on the substrate100 protrudes by a distance d3 to the edge of the vertical projection ofthe color filter pattern layer CF2 on the substrate 100, and the edge ofthe vertical projection of the shielding pattern layer BM on thesubstrate 100 protrudes by a distance d4 to the edge of the verticalprojection of the color filter pattern layer CF1 on the substrate 100.In the present embodiment, the distances d3 and d4 may be about 3 μm toabout 10 μm, respectively. In an embodiment, the distances d3 and d4 maybe about 6 μm, respectively.

As provided above, the color of the color filter pattern layer CF2 isdifferent from the color of the color filter pattern layer CF1. Hence,due to the designs that the edge of the vertical projection of theshielding pattern layer BM on the substrate 100 protrudes by thedistance d3 to the edge of the vertical projection of the color filterpattern layer CF2 on the substrate 100, and that the edge of thevertical projection of the shielding pattern layer BM on the substrate100 protrudes by the distance d4 to the edge of the vertical projectionof the color filter pattern layer CF1 on the substrate 100, the lightemitted by the OLED O1 is not easily absorbed by the color filterpattern layer CF2, and the light emitted by the OLED O2 is not easilyabsorbed by the color filter pattern layer CF1. The distances d3 and d4are respectively about 3 μm to about 10 μm, such that in the case thatthe light emitted by the OLED O1 is not easily absorbed by the colorfilter pattern layer CF2, and the light emitted by the OLED O2 is noteasily absorbed by the color filter pattern layer CF1, the interferenceof the ambient light with the display panel 10 may still be effectivelyreduced to a greater extent.

Besides, in this embodiment, the stacked portion (i.e., the stackedlayer structure SS1) formed by the color filter pattern layer CF2 andthe color filter pattern layer CF1 does not overlap the third opening W1and the third opening W2 of the touch structure layer TP. Namely, thevertical projection of the stacked layer structure SS1 is completelylocated within the vertical projection of the touch structure layer TP.

The color filter pattern layer CF3 provided in the present embodiment islocated on the second electrode C. The shielding pattern layer BMprovided in the present embodiment is located between the color filterpattern layer CF3 and the second electrode C. In another aspect,according to the present embodiment, the color filter pattern layer CF3and the color filter pattern layer CF1 are stacked right above theshielding pattern layer BM to form a stacked layer structure SS2.

The color filter pattern layer CF3 provided in the present embodimentmay be any color filter pattern layer that can be used in the OLEDdisplay panel and is well-known to people having ordinary skill in theart. The color of the color filter pattern layer CF3 may be red, green,or blue. According to the present embodiment, the color of the colorfilter pattern layer CF3 and the color of the color filter pattern layerCF1 are different, and the color of the color filter pattern layer CF1and the color of the color filter pattern layer CF3 may respectively beselected from a group consisting of the red color, the green color, andthe blue color. For instance, in an embodiment, the color of the colorfilter pattern layer CF1 is green, and the color of the color filterpattern layer CF3 is blue.

As described above, the color of the color filter pattern layer CF3 isdifferent from the color of the color filter pattern layer CF1.Therefore, if the ambient light is reflected by the shielding patternlayer BM to generate a reflected light, the reflected light passingthrough the stacked layer structure SS2 is completely absorbed by thestacked layer structure SS2. As a result, interference of the ambientlight with the display panel 10 is reduced, and the hue in the darkstate of the display panel 10 becomes more balanced.

In this embodiment, a stacked portion (i.e., the stacked layer structureSS2) formed by the color filter pattern layer CF3 and the color filterpattern layer CF1 does not overlap the second opening V1 of theshielding pattern layer BM. Namely, the vertical projection of thestacked layer structure SS2 is completely located within the verticalprojection of the shielding pattern layer BM. In another aspect, theedge of the vertical projection of the shielding pattern layer BM on thesubstrate 100 protrudes by a distance d5 to the edge of the verticalprojection of the color filter pattern layer CF3 on the substrate 100.In the present embodiment, the distance d5 may be about 3 μm to about 10μm. In an embodiment, the distance d5 may be about 6 μm.

As provided above, the color of the color filter pattern layer CF3 isdifferent from the color of the color filter pattern layer CF1. Hence,due to the design that the edge of the vertical projection of theshielding pattern layer BM on the substrate 100 protrudes by thedistance d5 to the edge of the vertical projection of the color filterpattern layer CF3 on the substrate 100, the light emitted by the OLED O1is not easily absorbed by the color filter pattern layer CF3.Specifically, the distance d5 is about 3 μm to about 10 μm, such that inthe case that the light emitted by the OLED O1 is not easily absorbed bythe color filter pattern layer CF3, the interference of the ambientlight with the display panel 10 may still be effectively reduced to agreater extent.

Besides, in this embodiment, the stacked portion (i.e., the stackedlayer structure SS2) formed by the color filter pattern layer CF3 andthe color filter pattern layer CF1 does not overlap the third opening W1of the touch structure layer TP. Namely, the vertical projection of thestacked layer structure SS2 is completely located within the verticalprojection of the touch structure layer TP.

The color filter pattern layer CF4 provided in the present embodiment islocated on the second electrode C. The shielding pattern layer BMprovided in the present embodiment is located between the color filterpattern layer CF4 and the second electrode C. In another aspect,according to the present embodiment, the color filter pattern layer CF2is located between the color filter pattern layer CF4 and the shieldingpattern layer BM, and the color filter pattern layer CF4 and the colorfilter pattern layer CF2 are stacked right above the shielding patternlayer BM to form a stacked layer structure SS3.

The color filter pattern layer CF4 provided in the present embodimentmay be any color filter pattern layer that can be used in the OLEDdisplay panel and is well-known to people having ordinary skill in theart. The color of the color filter pattern layer CF4 may be red, green,or blue. According to the present embodiment, the color of the colorfilter pattern layer CF4 and the color of the color filter pattern layerCF2 are different, and the color of the color filter pattern layer CF4and the color of the color filter pattern layer CF3 are the same. Forinstance, in an embodiment, the color of the color filter pattern layerCF2 is red, and the color of the color filter pattern layer CF4 is blue.

As described above, the color of the color filter pattern layer CF4 isdifferent from the color of the color filter pattern layer CF2.Therefore, if the ambient light is reflected by the shielding patternlayer BM to generate a reflected light, the reflected light passingthrough the stacked layer structure SS3 is completely absorbed by thestacked layer structure SS3. As a result, interference of the ambientlight with the display panel 10 is reduced, and the hue in the darkstate of the display panel 10 becomes more balanced.

In this embodiment, a stacked portion (i.e., the stacked layer structureSS3) formed by the color filter pattern layer CF4 and the color filterpattern layer CF2 does not overlap the second opening V2 of theshielding pattern layer BM. Namely, the vertical projection of thestacked layer structure SS3 is completely located within the verticalprojection of the shielding pattern layer BM. In another aspect, theedge of the vertical projection of the shielding pattern layer BM on thesubstrate 100 protrudes by a distance d6 to the edge of the verticalprojection of the color filter pattern layer CF4 on the substrate 100.In the present embodiment, the distance d6 may be about 3 μm to about 10μm. In an embodiment, the distance d6 may be about 6 μm.

As provided above, the color of the color filter pattern layer CF4 isdifferent from the color of the color filter pattern layer CF2. Hence,due to the design that the edge of the vertical projection of theshielding pattern layer BM on the substrate 100 protrudes by thedistance d6 to the edge of the vertical projection of the color filterpattern layer CF4 on the substrate 100, the light emitted by the OLED O2is not easily absorbed by the color filter pattern layer CF4.Specifically, the distance d6 is about 3 μm to about 10 μm, such that inthe case that the light emitted by the OLED O2 is not easily absorbed bythe color filter pattern layer CF4, the interference of the ambientlight with the display panel 10 may still be effectively reduced to agreater extent.

Besides, in this embodiment, the stacked portion (i.e., the stackedlayer structure SS3) formed by the color filter pattern layer CF4 andthe color filter pattern layer CF2 does not overlap the third opening W2of the touch structure layer TP. Namely, the vertical projection of thestacked layer structure SS3 is completely located within the verticalprojection of the touch structure layer TP.

In the present embodiment, the protection layer P2 is disposed among thecolor filter pattern layer CF2, the color filter pattern layer CF3, thecolor filter pattern layer CF4, and the cover plate 110 to provideprotection. According to this embodiment, the material of the protectionlayer P2 includes a polymer material, such as epoxy resin, acrylicresin, or the like.

In the present embodiment, the color filter pattern layer CF1 isdisposed on the OLED O1 and overlaps the first opening U1 and the secondopening V1, the color filter pattern layer CF2 is disposed on the OLEDO2 and overlaps the first opening U2 and the second opening V2, thecolor filter pattern layer CF2 and the color filter pattern layer CF1are stacked right above the shielding pattern layer BM, the color filterpattern layer CF3 and the color filter pattern layer CF1 are stackedright above the shielding pattern layer BM, and the color filter patternlayer CF4 and the color filter pattern layer CF2 are stacked right abovethe shielding pattern layer BM. Thereby, compared to the conventionalOLED display panel, the display panel 10 may have a smaller cell gap(about 3 μm to about 15 μm), thereby allowing the display panel 10 tohave a good viewing angle range and thus the color shift issue due toviewing angle change is improved. Owing to the arrangement of thestacked structure, the reflection amount of the ambient light by thedisplay panel 10 is reduced, thereby omitting the use of any polarizerand avoiding discomfort to the users. As such, compared to theconventional OLED display panel, the display panel 10 has better displayquality.

Besides, according to the embodiments shown in FIG. 1 and FIG. 2, thefirst openings of the pixel definition layer PDL are aligned with eachother to form a matrix, the second openings of the shielding patternlayer BM are aligned with each other to form a matrix, and the thirdopenings of the touch structure layer TP are aligned with each other toform a matrix; however, the invention is not limited thereto. Other waysto implement the invention are described below with reference to FIG. 3.Note that the reference numbers and some descriptions provided above areapplicable in the following embodiments, where the same or similarreference numbers are used to represent the same or similar elements,and the descriptions of the same technical contents are omitted.Reference may be made to the foregoing embodiments for the omitteddescriptions, and therefore no further explanation is provided in thefollowing embodiments.

FIG. 3 is a schematic top view illustrating an arrangement of a pixeldefinition layer, a touch structure, and a shielding pattern layeraccording to another embodiment. With reference to FIG. 3 and FIG. 2,the main differences between the embodiment shown in FIG. 3 and theembodiment shown in FIG. 2 lie in the way to arrange the first openings(including the first opening U1 and the first opening U2) of the pixeldefinition layer PDL, the way to arrange the second openings (includingthe second opening V1 and the second opening V2) of the shieldingpattern layer BM, and the way to arrange the third openings (includingthe third opening W1 and the third opening W2) of the touch structurelayer TP.

In the embodiment shown in FIG. 3, the first openings (including thefirst opening U1 and the first opening U2) of the pixel definition layerPDL are arranged in a staggered manner, the second openings (includingthe second opening V1 and the second opening V2) of the shieldingpattern layer BM are arranged in a staggered manner, and the thirdopenings (including the third opening W1 and the third opening W2) ofthe touch structure layer TP are arranged in a staggered manner.

To sum up, the display panel provided in one or more embodiments of theinvention includes the active device located on the substrate, the firstelectrode electrically connected to the active device, the pixeldefinition layer having the first opening overlapped with the firstelectrode, the light emitting layer located within the first opening andon the first electrode, the second electrode disposed on the lightemitting layer, the shielding pattern layer disposed on the secondelectrode and having a second opening overlapped with the first opening,one color filter pattern layer disposed on the second electrode andoverlapped with the first opening and the second opening, and anothercolor filter pattern layer stacked with said color filter pattern layerright above the shielding pattern layer. Hence, in comparison with theconventional OLED display panel, the display panel provided in one ormore embodiments of the invention may have a smaller cell gap (about 3μm to about 15 μm), thereby allowing the display panel to have a goodviewing angle range and thus the color shift issue due to viewing anglechange is improved. The reflection amount of the ambient light by thedisplay panel provided in one or more embodiments of the invention isreduced in comparison with the conventional OLED display panel, therebyomitting the use of any polarizer and avoiding discomfort to the users.As such, compared to the conventional OLED display panel, the displaypanel provided in one or more embodiments of the invention has betterdisplay quality.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure described inthe disclosure without departing from the scope or spirit of thedisclosure. In view of the foregoing, it is intended that the disclosurecover modifications and variations provided they fall within the scopeof the following claims and their equivalents.

What is claimed is:
 1. A display panel, comprising: an active device,disposed on a substrate; a first electrode electrically connected to theactive device; a pixel definition layer having a first openingoverlapped with the first electrode; a light emitting layer, wherein atleast a portion of the light emitting layer is disposed within the firstopening and located on the first electrode; a second electrode disposedon the light emitting layer; a shielding pattern layer disposed on thesecond electrode, the shielding pattern layer having a second openingoverlapped with the first opening; a first color filter pattern layerdisposed on the second electrode and overlapped with the first openingand the second opening; and a second color filter pattern layer disposedon the second electrode, wherein the first color filter pattern layerand the second color filter pattern layer are stacked with each otherright above the shielding pattern layer.
 2. The display panel as claimedin claim 1, wherein an edge of a vertical projection of the shieldingpattern layer on the substrate protrudes by a distance to an edge of avertical projection of the second color filter pattern layer on thesubstrate.
 3. The display panel as claimed in claim 2, wherein thedistance is from about 3 μm to about 10 μm.
 4. The display panel asclaimed in claim 1, wherein an edge of a vertical projection of thepixel definition layer on the substrate protrudes by a distance to anedge of a vertical projection of the shielding pattern layer on thesubstrate.
 5. The display panel as claimed in claim 4, wherein thedistance is from about 3 μm to about 10 μm.
 6. The display panel asclaimed in claim 1, wherein a light emitted via the light emitting layerand a light passing through the first color filter pattern layer havesame color.
 7. The display panel as claimed in claim 1, wherein amaterial of the pixel definition layer comprises a photosensitivepolyimide material, a propylene-based material, a siloxane material, aphenolic resin material, oxides, nitrides, or oxynitrides.
 8. Thedisplay panel as claimed in claim 1, further comprising: a touchstructure layer disposed between the second electrode and the shieldingpattern layer, wherein the touch structure layer has a third openingoverlapped with the first opening and the second opening, and a width ofthe third opening is greater than a width of the second opening.
 9. Thedisplay panel as claimed in claim 8, wherein a stacked portion formed bythe second color filter pattern layer and the first color filter patternlayer is not overlapped with the third opening.
 10. The display panel asclaimed in claim 1, further comprising: a package structure layerdisposed between the second electrode and the shielding pattern layer; acover plate disposed opposite to the substrate; and a protection layerdisposed between the second color filter pattern layer and the coverplate.
 11. The display panel as claimed in claim 10, wherein theshielding pattern layer is in contact with the package structure layer.12. The display panel as claimed in claim 1, wherein a minimum verticaldistance from an upper surface of a portion of the second electrodeoverlapped with the light emitting layer to an upper surface of theshielding pattern layer is about 6 μm.
 13. The display panel as claimedin claim 1, wherein the light emitting layer includes a white organiclight emitting material.
 14. A display panel, comprising: a plurality ofactive devices disposed on a substrate; a plurality of first electrodeselectrically connected to the plurality of active devices, respectively;a pixel definition layer having a plurality of first openingsrespectively overlapped with the first electrodes; a plurality of lightemitting layers respectively overlapped with the first openings andrespectively located on the first electrodes; at least one secondelectrode disposed on the light emitting layers; a shielding patternlayer disposed on the at least one second electrode, the shieldingpattern layer having a plurality of second openings overlapped with thefirst openings, respectively; a first color filter pattern layerdisposed on the at least one second electrode and overlapped with acorresponding one of the first openings and a corresponding one of thesecond openings; and a second color filter pattern layer disposed on theat least one second electrode, wherein a stacked portion formed by thesecond color filter pattern layer and the first color filter patternlayer is right above the shielding pattern layer and not overlapped withthe second openings.
 15. The display panel as claimed in claim 14,wherein the second openings are aligned to form a matrix.
 16. Thedisplay panel as claimed in claim 14, wherein the second openings arearranged in a staggered manner.